Screen-plate cleaner.



H. R. FARNSWORTH & T. H. SAVERY, JR.

SCREEN PLATE CLEANER.

APPLICATION FILED SEPT. 30. 1915.

Patented Jan. 11, 1916.

INVENTORS, [file/2d R farlzawarzh, BY Thamas Z2 Jan/cry Jr ATTORNEY.

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HILANID R. FARNSWORTH AND THOMAS H. SAVERY, JB., OF SANDUSKY, OHIO.

' SCREEN-PLATE CLEANER.

To all whom it may concern:

Be it known that we, HILAND R. FARNs- WORTH and THOMAS H. SAVERY, J r., citizens of the United States of America, residing in the city of Sandusky, county of Erie, and

State of Ohio, have invented certain new and useful Improvements in Screen-Plate Cleaners, of which the following is a specification.

This invention relates to improvements in devices for cleaning the screens which are used in the manufacture of paper. Such screens are shown in a patent granted to H. R. and W. R. Farnsworth on March 3, 1903, No. 721,875. It is a well known fact that the openings in screen plates like the one referred to often become clogged up with the paper'pulp or some other foreign substance or material, preventing the water contained in the pulp from freely escaping through the openings or screen plate slots prior to its passage onto the paper making machine. Our invention is designed to providea device for readily removing the paper pulp, foreign or objectionable matter or material from the slots or openings of the screening surface. Broadly, it comprises a nozzle or suction tool :so designed and of such shape or form that it may be passed over the screening surface, (whether it be round, angular, or flat) on the same side or surface which receives the stock or pulp, or onto which the stock flows in passing through the plates or screening surface. It is, of course, understood that the tool is not limited in its use to a screen having a flat surface as it may be used on screen plates that are round. Such a device is also useful in cleaning Fourdrinier ,wires, cylinder faces, suction rolls, shower pipes, etc., of the paper making machine, if desired.

Referring to the drawings, which form a part of the specification Figure 1 is a transverse sectional view on the line 11 of Fig. 2, clearly showing the construction of the tool; Fig. 2 is a longitudinal sectional view on the broken line 2-2 of Fig. 1, showing the manner of inserting the removable block or foot piece.

Referring to the drawings in detail1 designates the casing member having the depending sides 2, and the centrally located threaded opening 3 in which the suction pipe 4 is located, the attachment being Specification of Letters Patent.

Application filed September 30, 1915.

Patented Jan. 11, 1916.

Serial No. 53,242.

made by means of the usual threaded connection.

5 is a removable face piece or block preferably formed of wood, or hard rubber, although we do not limit ourselves to the use of any particular substance or material. This block is made so as to have a tight, yet easily removable, fit within the casing 1. Its lower edge is made with an inclined surface, as indicated at 6, which terminates and coincides with the lower edge 7 of the casing, as shown.

8 designates a longitudinal opening which opens into an enlarged opening 9, the width of which is substantially equal to the inside diameter of the suction pipe.

The screen plate cleaners are used by con necting a suitable suction device to the pipe 4, as a vacuum pump or other suction or vacuum creating device or means, by means of a piping or hose connection. The device, as stated above, is intended for use by simply moving the cleaner over the slotted or perforated parts of the screen plates while the screen is in operation, or otherwise. By using the vacuum cleaner the circulation of the stock and water through the screen plates is reversed, and, by drawing or sucking the water and pulp back through the screen the fibers or dirt may be loosened and the slots effectively cleaned.

It is to be understood that we do not confine ourselves to any specific shape or form of the removable piece 5, as other forms may, if desired, be used, also we do not confine ourselves to any specific use as the screen plate cleaner may be employed for other analogous or similar uses.

One of the advantages of our invention in making the block removable from the casing is that in case the lower surface becomes worn or irregular in shape so that the suction is not perfect, it may be readily removed and its lower edge straightened by planing or grinding.

It is to be understood that the stock and water which is drawn up by the screen plate cleaner and the vacuum pump should, of course, be returned to the main circulating system, as may be desired.

\Vhat we claim is 1. A vacuum screen plate cleaner comprising, in combination, a casing having dc? pending sides and an open recessed bottom PQ fi Q l, b ock removably fitted 1n e c sing and formed with an elongated opening in its lower side, said opening leading to an enlarged elongated opening having'fiaring or inclined sides which extend outwardly from the elongated opening, and a suction pipe connected to the casing to which a vacuum producing means may be connected;

ing and formed with an elongated opening Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, I

2 in its lower side; said opening leading to an enlarged'elongated opening having flaring or inclined sides which extend outwardly from the elongated opening, and-a SHCUOII .which terminate at. the lower inner edge or border of the opening formed by the depending sides ofthe casing.

' H; R. FARNSWORTH.

THOMAS H. SAVERY, JR.

Washington, D. C. 

